A payment layer you call, not one you operate
Verify and settle over HTTP
Two endpoints and a poll. The facilitator recovers the signature, broadcasts the transfer, and reports when it confirms on-chain.
Gasless for your buyers
Buyers sign an EIP-3009 authorization and never submit a transaction, so they never hold native XDC. The facilitator pays the gas.
Seller API keys
One bearer string per deployment, shown once, stored only as a hash. Label it, rate-limit it, rotate or revoke it from the dashboard.
Prepaid credits
1 credit = 0.001 USDC, fixed, so credit you bought last month is worth the same today. Only confirmed settlements draw it down.
Top up in USDC
Pay from your XDC AI smart wallet or a linked wallet, then paste the transaction hash. No card, no invoice, no account number to quote.
Usage and history
Requests per key, settlement records with their transaction hashes, and the facilitator's own ledger of credit added and credit spent.
Keys, credits and settlements in one place
The facilitator keys your account by the address your API is paid at, so pick that address once and everything hangs off it.
One-time setup. Choose your receiving address, mint a key for each deployment, and keep the quota in view.
Credits without ceremony. Buy in USDC from a wallet you already hold, paste the hash, and watch the balance move.
Proof after the fact. Per-key usage, settlement records with transaction hashes, and the ledger behind every debit.
12,480
credits · 1 credit = 0.001 USDC
- active
production
ID: 8c9208ecb7d5 · 600/min
- active
staging
ID: 4f71ab0d92e4 · 120/min
https://public-facilitator.xdcai.tech
Dashboard preview with sample figures
Three ways to charge for an API call
Most sellers should use the gateway: no key, no credits, no polling loop, and the service gets listed in the marketplace. Reach for the facilitator when the payment logic belongs in your own application.
Gateway
Point it at your existing API and it handles 402, verification and settlement for you. Nothing to manage, and your service gets listed in the marketplace.
List your servicePublic facilitator
this pageYou host the API and own the payment logic. You manage a seller API key and the verify, settle and polling calls.
Open the dashboardRun your own
You operate the whole payment layer, including the wallet that submits settlements and pays the gas for them.
Build a facilitatorCommon questions
How hard is it to integrate?
It is a small integration. Your server answers 402 with a price, calls verify, calls settle, and polls until it confirms. There is no blockchain code to write and no wallet or node to run. The seller guide has copy-paste examples for each call.
Do my buyers need an account, a wallet setup, or credits?
No. Anyone holding USDC on XDC pays from the wallet they already use, with no account here and no gas to worry about. That keeps friction near zero for the people paying you. Everything you manage, the key and the credits, is on your side, not theirs.
How much does it cost me?
You prepay credits, where 1 credit is 0.001 USDC and the rate is fixed, and only confirmed on-chain settlements draw them down. Verify calls and health checks are free. You top up in USDC from a wallet you already hold, with no card and no invoice.
What happens if I run out of credits during traffic?
Settle returns a clear billing error that is about your account, not the buyer's payment, so your API should not tell them the payment failed. You top up and you are live again. Keep a buffer so a spike does not catch you out.
Is it reliable, and are my funds ever at risk?
Funds move directly from the buyer to your receiving address in USDC. The facilitator submits the settlement and pays the gas, and every settlement reports its on-chain transaction hash, so you can audit each payment yourself. It never holds your money.
Should I use this or the gateway?
Use the gateway if you want XDC AI to wrap your existing API with no code changes and list it in the marketplace. Use the public facilitator when you host the API yourself and want the payment logic to live in your own application.
Mint a key and settle your first call
Pick the address your API is paid at, create a key, and top up credits when you are ready to go live.